eiac/xterm.js
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support z-index + dual canvas for DOM. Doesnt work for webgl

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This commit is contained in:
Anthony Kim
2026-02-11 14:19:27 -08:00
parent 2c4997f529
commit 1d0cf32b28
7 changed files with 235 additions and 50 deletions
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addons/addon-image/src/kitty/KittyGraphicsHandler.ts
+9 -3
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@@ -3,7 +3,7 @@
* @license MIT
*/
import { IApcHandler, IImageAddonOptions, IResetHandler, ITerminalExt } from '../Types';
import { IApcHandler, IImageAddonOptions, IResetHandler, ITerminalExt, ImageLayer } from '../Types';
import { ImageRenderer } from '../ImageRenderer';
import { ImageStorage, CELL_SIZE_DEFAULT } from '../ImageStorage';
import Base64Decoder, { type DecodeStatus } from 'xterm-wasm-parts/lib/base64/Base64Decoder.wasm';
@@ -504,12 +504,18 @@ export class KittyGraphicsHandler implements IApcHandler, IResetHandler {
const savedY = buffer.y;
const savedYbase = buffer.ybase;
// Determine layer based on z-index: negative = behind text, 0+ = on top.
// Bottom layer only works when allowTransparency is enabled (otherwise text
// canvas background is opaque and hides the bottom canvas). Fall back to top.
const wantsBottom = cmd.zIndex !== undefined && cmd.zIndex < 0;
const layer: ImageLayer = (wantsBottom && this._coreTerminal.options.allowTransparency) ? 'bottom' : 'top';
let storageId: number;
if (w !== bitmap.width || h !== bitmap.height) {
const resized = await createImageBitmap(bitmap, { resizeWidth: w, resizeHeight: h });
storageId = this._storage.addImage(resized);
storageId = this._storage.addImage(resized, layer);
} else {
storageId = this._storage.addImage(bitmap);
storageId = this._storage.addImage(bitmap, layer);
}
this._kittyIdToStorageId.set(image.id, storageId);